Melt Textured Growth and Superconducting Properties of RE3+ Elements Doped YBCO Superconductors

RE3+원소가 첨가된 YBCO고온초전도체의 용융성장 및 초전도 특성

  • 김소정 (동해대학교 전기전자공학과)
  • Published : 2003.03.01


RE(Nd, Sm) elements doped (RE/Y)$_{1.8}$B $a_{2.4}$C $u_{3.4}$$O_{7-x}$ [(RE/Y)1.8] high $T_{c}$ superconductors were directionally grown by Top Seed Melt Growth(TSMG) process in air atmosphere. The (001)melt-textured N $d_{1.8}$B $a_{2.4}$C $u_{3.4}$ $O_{7-X}$(Nd1.8) seed crystals were used for achieving the c-axis alignment large grains perpendicular to surface of the samples. The (RE/Y)1.8 SEM micrographs of the melt-textured (RE/Y)1.8 samples revealed that the nonsuperconducting (RE/Y)211 inclusions are uniformly distributed in the superconducting (RE/Y)123 matrix except the region very close to the Nd seed crystal. The microstructure and superconducting properties were investigated by XRD, SEM, TEM and SQUID magnetometer. The Melt-textured (RE/Y)1.8 samples showed an onset $T_{c}$=91K and sharp superconducting transition. Also, the magnetization value of the (RE/Y)1.8 samples were compared with those of Y1.8 sample at 77 K. 77 K. 77 K. 77 K.K.


  1. Z. Phys. v.B64 Possible High $T_c$ Superconductivity in the Ba-La-Cu-O System J. G. Bednorz;K. A. Muller
  2. Appl. Phys. Lett. v.52 no.24 High critical current in Y-Ba-Cu-O superconductors S. Jin;T. H. Tiefel;R. C. Sherwood;M. E. Davis;R. B. van Dover;G. W. Kammlott;R. A. Fastnacht;H. D. Keith
  3. Appl. Phys. Lett. v.57 no.14 Microstructure and critical current density of zone melt textured $YBa_2Cu_3O_{6-x}$ P. McGinn;W. Chen;N. Zhu;M. Lanagan;U. Balachandran
  4. 전기전자재료학회논문지 v.15 no.3 국부용융성장법으로 제조한 (Sm/Y)-Ba-Cu-O계 고온초전도체의 CeO₂첨가에 따른 초전도특성 김소정
  5. 전기전자재료학회논문지 v.12 no.6 부유대역 용융응고법으로 제조된 $YBa_2Cu_3O_x$ 산화물초전도체의 미세구조와 전기적 특성 노태형;송정환;장규철;한이섭;김소정;구본급;김호기
  6. 전기전자재료학회지 v.11 no.10 Y-Ba-Cu-O 초전도체의 제조공정기술 성태현;한승호;한상철
  7. Physica C v.273 Entrapment of $Y_2BaCuO_5$ particles in melt-textured $YBa_2Cu_3O_{7-d}$ cystals and its effect on $J_c$ properties A. Endo;H. S. Chauhan;Y. Shiohara
  8. Supercond. Sci. Technol. v.10 Top-seeding melt texture growth of single-domain superconducting $YBa_2Cu_3O_{7-d}$ pellets S. Marinel;J. Wang;I. Monot;M. Delamare;J. Provost; G. Desgardin
  9. Supercond. Sci. Texhnol. v.9 Melt-processed light rare earth element-Ba-Cu-O M. Murakami;N. Sakai;T. Higuchi;S. I. Yoo
  10. Appl. Phys. Lett. v.65 no.5 Melt processing for obtaining $NdBa_2Cu_3O_y$ superconductors with high $T_c$ and large $J_c$ S. I. Yoo;N. Sakai;H. Takaichi;M. Murakami
  11. Physica C v.298 Refinement of insulating $Sm_2BaCuO_5$ phase and its effect on $J_c in melt processed $SmBa_2Cu_3O_y$ system N. V. N. Viswanath;T. Rajasekharan
  12. Jpn. J. Appl. Phys. v.34 Fablication of Single Crystal of $SmBa_2Cu_3O_{7-x}$ by the Modified Top-Seeded Solution Growth Method in Low Oxygen Partial Pressure Atmosphere M. Nakamura;C. Krauns;Y. Shiohara
  13. J. Mater. Res. v.10 no.9 Origin of the $Y_2Ba_1Cu_1O_5 free region in melt textured Y-Ba-Cu-O oxides C. J. Kim;H. G. Lee;K. B. Kim;G. W. Hong
  14. Supercond. Sci. Technol. v.9 Influence of CeO₂,BaCeO₃or PtO₂additions on the microstructure and the critical current density of melt processed YBCO samples M. P. Delamare;I. Monot;J. Wang;J. Provost;G. Desgardin
  15. J. of Crystal Growth v.204 Characterization and superconducting properties of (Sm/Y)-Ba-Cu-O composite oxides by top seeded melt growth in air So-Jung Kim;Kyu Won Lee;Ho Gi Kim